[Tutor] Optparse question: if only certain values are acceptable
carroll at tjc.com
Sat May 9 00:37:04 CEST 2009
I'm tryng to use optparse for the first time.
The toy summary is that I want to have the following command format:
prognam -f FORMAT
Where FORMAT, if specified, must be one of "X", "Y", or "Z".
In otherwords, if the user enters:
progname -f X
It runs, producing its output in format X. Similar if "Y" or "Z" is
specified instead of "X".
But if the user specifies
progname -f A
I want it to spit up because A is not a recognized format.
I don't see anything in the docs that directly addresses this. Is this
something that I should use the callback parameter for?
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